// Package main implements the bd CLI label management commands.
package main
import (
	"context"
	"encoding/json"
	"fmt"
	"os"
	"sort"
	"strings"
	"github.com/spf13/cobra"
	"github.com/steveyegge/beads/internal/rpc"
	"github.com/steveyegge/beads/internal/types"
	"github.com/steveyegge/beads/internal/ui"
	"github.com/steveyegge/beads/internal/utils"
)
var labelCmd = &cobra.Command{
	Use:     "label",
	GroupID: "issues",
	Short:   "Manage issue labels",
}
// Helper function to process label operations for multiple issues
func processBatchLabelOperation(issueIDs []string, label string, operation string, jsonOut bool,
	daemonFunc func(string, string) error, storeFunc func(context.Context, string, string, string) error) {
	ctx := rootCtx
	results := []map[string]interface{}{}
	for _, issueID := range issueIDs {
		var err error
		if daemonClient != nil {
			err = daemonFunc(issueID, label)
		} else {
			err = storeFunc(ctx, issueID, label, actor)
		}
		if err != nil {
			fmt.Fprintf(os.Stderr, "Error %s label %s %s: %v\n", operation, operation, issueID, err)
			continue
		}
		if jsonOut {
			results = append(results, map[string]interface{}{
				"status":   operation,
				"issue_id": issueID,
				"label":    label,
			})
		} else {
			verb := "Added"
			prep := "to"
			if operation == "removed" {
				verb = "Removed"
				prep = "from"
			}
			fmt.Printf("%s %s label '%s' %s %s\n", ui.RenderPass("✓"), verb, label, prep, issueID)
		}
	}
	if len(issueIDs) > 0 && daemonClient == nil {
		markDirtyAndScheduleFlush()
	}
	if jsonOut && len(results) > 0 {
		outputJSON(results)
	}
}
func parseLabelArgs(args []string) (issueIDs []string, label string) {
	label = args[len(args)-1]
	issueIDs = args[:len(args)-1]
	return
}
//nolint:dupl // labelAddCmd and labelRemoveCmd are similar but serve different operations
var labelAddCmd = &cobra.Command{
	Use:   "add [issue-id...] [label]",
	Short: "Add a label to one or more issues",
	Args:  cobra.MinimumNArgs(2),
	Run: func(cmd *cobra.Command, args []string) {
		CheckReadonly("label add")
		// Use global jsonOutput set by PersistentPreRun
		issueIDs, label := parseLabelArgs(args)
		// Resolve partial IDs
		ctx := rootCtx
		resolvedIDs := make([]string, 0, len(issueIDs))
		for _, id := range issueIDs {
			var fullID string
			var err error
			if daemonClient != nil {
				resolveArgs := &rpc.ResolveIDArgs{ID: id}
				resp, err := daemonClient.ResolveID(resolveArgs)
				if err != nil {
					fmt.Fprintf(os.Stderr, "Error resolving %s: %v\n", id, err)
					continue
				}
				if err := json.Unmarshal(resp.Data, &fullID); err != nil {
					fmt.Fprintf(os.Stderr, "Error unmarshaling resolved ID: %v\n", err)
					continue
				}
			} else {
				fullID, err = utils.ResolvePartialID(ctx, store, id)
				if err != nil {
					fmt.Fprintf(os.Stderr, "Error resolving %s: %v\n", id, err)
					continue
				}
			}
			resolvedIDs = append(resolvedIDs, fullID)
		}
		issueIDs = resolvedIDs

		// Protect reserved label namespaces
		// provides:* labels can only be added via 'bd ship' command
		if strings.HasPrefix(label, "provides:") {
			FatalErrorRespectJSON("'provides:' labels are reserved for cross-project capabilities. Hint: use 'bd ship %s' instead", strings.TrimPrefix(label, "provides:"))
		}

		processBatchLabelOperation(issueIDs, label, "added", jsonOutput,
			func(issueID, lbl string) error {
				_, err := daemonClient.AddLabel(&rpc.LabelAddArgs{ID: issueID, Label: lbl})
				return err
			},
			func(ctx context.Context, issueID, lbl, act string) error {
				return store.AddLabel(ctx, issueID, lbl, act)
			})
	},
}
//nolint:dupl // labelRemoveCmd and labelAddCmd are similar but serve different operations
var labelRemoveCmd = &cobra.Command{
	Use:   "remove [issue-id...] [label]",
	Short: "Remove a label from one or more issues",
	Args:  cobra.MinimumNArgs(2),
	Run: func(cmd *cobra.Command, args []string) {
		CheckReadonly("label remove")
		// Use global jsonOutput set by PersistentPreRun
		issueIDs, label := parseLabelArgs(args)
		// Resolve partial IDs
		ctx := rootCtx
		resolvedIDs := make([]string, 0, len(issueIDs))
		for _, id := range issueIDs {
			var fullID string
			var err error
			if daemonClient != nil {
				resolveArgs := &rpc.ResolveIDArgs{ID: id}
				resp, err := daemonClient.ResolveID(resolveArgs)
				if err != nil {
					fmt.Fprintf(os.Stderr, "Error resolving %s: %v\n", id, err)
					continue
				}
				if err := json.Unmarshal(resp.Data, &fullID); err != nil {
					fmt.Fprintf(os.Stderr, "Error unmarshaling resolved ID: %v\n", err)
					continue
				}
			} else {
				fullID, err = utils.ResolvePartialID(ctx, store, id)
				if err != nil {
					fmt.Fprintf(os.Stderr, "Error resolving %s: %v\n", id, err)
					continue
				}
			}
			resolvedIDs = append(resolvedIDs, fullID)
		}
		issueIDs = resolvedIDs
		processBatchLabelOperation(issueIDs, label, "removed", jsonOutput,
			func(issueID, lbl string) error {
				_, err := daemonClient.RemoveLabel(&rpc.LabelRemoveArgs{ID: issueID, Label: lbl})
				return err
			},
			func(ctx context.Context, issueID, lbl, act string) error {
				return store.RemoveLabel(ctx, issueID, lbl, act)
			})
	},
}
var labelListCmd = &cobra.Command{
	Use:   "list [issue-id]",
	Short: "List labels for an issue",
	Args:  cobra.ExactArgs(1),
	Run: func(cmd *cobra.Command, args []string) {
		// Use global jsonOutput set by PersistentPreRun
		ctx := rootCtx
		// Resolve partial ID first
		var issueID string
		if daemonClient != nil {
			resolveArgs := &rpc.ResolveIDArgs{ID: args[0]}
			resp, err := daemonClient.ResolveID(resolveArgs)
			if err != nil {
				FatalErrorRespectJSON("resolving issue ID %s: %v", args[0], err)
			}
			if err := json.Unmarshal(resp.Data, &issueID); err != nil {
				FatalErrorRespectJSON("unmarshaling resolved ID: %v", err)
			}
		} else {
			var err error
			issueID, err = utils.ResolvePartialID(ctx, store, args[0])
			if err != nil {
				FatalErrorRespectJSON("resolving %s: %v", args[0], err)
			}
		}
		var labels []string
		// Use daemon if available
		if daemonClient != nil {
			resp, err := daemonClient.Show(&rpc.ShowArgs{ID: issueID})
			if err != nil {
				FatalErrorRespectJSON("%v", err)
			}
			var issue types.Issue
			if err := json.Unmarshal(resp.Data, &issue); err != nil {
				FatalErrorRespectJSON("parsing response: %v", err)
			}
			labels = issue.Labels
		} else {
			// Direct mode
			var err error
			labels, err = store.GetLabels(ctx, issueID)
			if err != nil {
				FatalErrorRespectJSON("%v", err)
			}
		}
		if jsonOutput {
			// Always output array, even if empty
			if labels == nil {
				labels = []string{}
			}
			outputJSON(labels)
			return
		}
		if len(labels) == 0 {
			fmt.Printf("\n%s has no labels\n", issueID)
			return
		}
		fmt.Printf("\n%s Labels for %s:\n", ui.RenderAccent("🏷"), issueID)
		for _, label := range labels {
			fmt.Printf("  - %s\n", label)
		}
		fmt.Println()
	},
}
var labelListAllCmd = &cobra.Command{
	Use:   "list-all",
	Short: "List all unique labels in the database",
	Run: func(cmd *cobra.Command, args []string) {
		// Use global jsonOutput set by PersistentPreRun
		ctx := rootCtx
		var issues []*types.Issue
		var err error
		// Use daemon if available
		if daemonClient != nil {
			resp, err := daemonClient.List(&rpc.ListArgs{})
			if err != nil {
				FatalErrorRespectJSON("%v", err)
			}
			if err := json.Unmarshal(resp.Data, &issues); err != nil {
				FatalErrorRespectJSON("parsing response: %v", err)
			}
		} else {
			// Direct mode
			issues, err = store.SearchIssues(ctx, "", types.IssueFilter{})
			if err != nil {
				FatalErrorRespectJSON("%v", err)
			}
		}
		// Collect unique labels with counts
		labelCounts := make(map[string]int)
		for _, issue := range issues {
			if daemonClient != nil {
				// Labels are already in the issue from daemon
				for _, label := range issue.Labels {
					labelCounts[label]++
				}
			} else {
				// Direct mode - need to fetch labels
				labels, err := store.GetLabels(ctx, issue.ID)
				if err != nil {
					FatalErrorRespectJSON("getting labels for %s: %v", issue.ID, err)
				}
				for _, label := range labels {
					labelCounts[label]++
				}
			}
		}
		if len(labelCounts) == 0 {
			if jsonOutput {
				outputJSON([]string{})
			} else {
				fmt.Println("\nNo labels found in database")
			}
			return
		}
		// Sort labels alphabetically
		labels := make([]string, 0, len(labelCounts))
		for label := range labelCounts {
			labels = append(labels, label)
		}
		sort.Strings(labels)
		if jsonOutput {
			// Output as array of {label, count} objects
			type labelInfo struct {
				Label string `json:"label"`
				Count int    `json:"count"`
			}
			result := make([]labelInfo, 0, len(labels))
			for _, label := range labels {
				result = append(result, labelInfo{
					Label: label,
					Count: labelCounts[label],
				})
			}
			outputJSON(result)
			return
		}
		fmt.Printf("\n%s All labels (%d unique):\n", ui.RenderAccent("🏷"), len(labels))
		// Find longest label for alignment
		maxLen := 0
		for _, label := range labels {
			if len(label) > maxLen {
				maxLen = len(label)
			}
		}
		for _, label := range labels {
			padding := strings.Repeat(" ", maxLen-len(label))
			fmt.Printf("  %s%s  (%d issues)\n", label, padding, labelCounts[label])
		}
		fmt.Println()
	},
}
func init() {
	// Issue ID completions
	labelAddCmd.ValidArgsFunction = issueIDCompletion
	labelRemoveCmd.ValidArgsFunction = issueIDCompletion
	labelListCmd.ValidArgsFunction = issueIDCompletion

	labelCmd.AddCommand(labelAddCmd)
	labelCmd.AddCommand(labelRemoveCmd)
	labelCmd.AddCommand(labelListCmd)
	labelCmd.AddCommand(labelListAllCmd)
	rootCmd.AddCommand(labelCmd)
}